KR20040037655A - Flange for pipe and method apparatus for producing thereof - Google Patents

Flange for pipe and method apparatus for producing thereof Download PDF

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Publication number
KR20040037655A
KR20040037655A KR1020020066229A KR20020066229A KR20040037655A KR 20040037655 A KR20040037655 A KR 20040037655A KR 1020020066229 A KR1020020066229 A KR 1020020066229A KR 20020066229 A KR20020066229 A KR 20020066229A KR 20040037655 A KR20040037655 A KR 20040037655A
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KR
South Korea
Prior art keywords
flange
center pin
hole
center
injection molding
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KR1020020066229A
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Korean (ko)
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KR100562532B1 (en
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변무원
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변무원
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Priority to KR1020020066229A priority Critical patent/KR100562532B1/en
Publication of KR20040037655A publication Critical patent/KR20040037655A/en
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Publication of KR100562532B1 publication Critical patent/KR100562532B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14598—Coating tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14065—Positioning or centering articles in the mould
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/14—Flanged joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14065—Positioning or centering articles in the mould
    • B29C2045/14122—Positioning or centering articles in the mould using fixed mould wall projections for centering the insert
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14065—Positioning or centering articles in the mould
    • B29C2045/14147—Positioning or centering articles in the mould using pins or needles penetrating through the insert
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B29K2705/08—Transition metals
    • B29K2705/12—Iron
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/24—Pipe joints or couplings

Abstract

PURPOSE: A flange for jointing pipes, an injection molding machine and manufacturing method thereof are provided to reduce manufacturing cost and prevent the iron flange from corroding by coating the outer surface of the iron flange with synthetic resin. CONSTITUTION: In injection molding machine for a pipe jointing flange, an iron flange(1) has a doughnut shape. A pipe hole(2) is formed at the center of the iron flange. Bolt holes(3) and at least two center pin holes(4) are formed around the pipe hole. An upper mold(20) includes a center pin(22) fit into the pipe hole. A lower mold(10) includes center pins(12) and bolt pins(11) fit into the center pin holes and the bolt holes respectively. Synthetic resin liquid is injected into the inside of the upper and lower mold so that the iron flange is coated with the synthetic resin except the center pin holes.

Description

관이음용 플랜지 및 사출성형장치와 그 제조방법{Flange for pipe and method apparatus for producing thereof}Flange for pipe and method apparatus for producing etc

본 발명은 길이가 긴 관의 이음시 기밀을 유지하기 위하여 견고하게 연결시켜 주는 플랜지에 관한 것으로, 특히 관과 별개로 제작되는 플랜지를 저렴한 철제로 제작하되 철제의 전체 외면을 합성수지제의 피막층으로 사출성형하여 플랜지의 저렴한 가격과 철제의 부식을 방지하도록 한 관이음용 플랜지 및 사출성형장치와 그 제조방법에 관한 것이다.The present invention relates to a flange that is firmly connected in order to maintain the airtightness in the joint of a long length of the pipe, in particular, the flange is manufactured separately from the pipe made of inexpensive steel, but the entire outer surface of the steel is injected into the coating film made of synthetic resin The present invention relates to a pipe joint flange, an injection molding apparatus, and a method of manufacturing the same, which are molded to prevent inexpensive flanges and corrosion of steel.

일반적으로 관의 이음시 관의 끝단부에 이음용 플랜지를 일체형으로 형성하거나 별개로 제작되는 분리형으로 각각 형성한 뒤 길이가 긴 관을 견고하게 연결하여 기밀을 유지하도록 하였다. 즉 일체형은 관과 일체로 형성되어 있어 양끝단을 상호 밀착시킨 뒤 양측 플랜지를 체결용보울트로 체결하도록 되어 있으며, 분리형은 양측 관에 각각 끼워서 끝단부에 걸리도록 한 뒤 일체형과 동일한 방법으로 체결하도록 되어 있다.In general, when the joint of the pipe is formed integrally formed at the end of the pipe joints or separately formed separately to form a separate length after the long length of the pipe is firmly connected to maintain the airtight. In other words, the one-piece type is formed integrally with the tube so that both ends are in close contact with each other and the two flanges are fastened with fastening bolts. It is.

본 발명에서 설명하고자 하는 플랜지는 분리형으로서, 종래의 분리형 플랜지는 철제 또는 스테인레스제의 금속제를 사용하였던 것으로, 철제의 경우 공기중이나 수분에 의하여 부식되어 수명이 단축되거나 부식에 의하여 체결부위가 헐거워져서 누수되는 문제점이 있었고, 스테인레스제의 경우 철제의 문제점을 해소할 수가 있으나 그 단가가 워낙 고가로서 시공비의 상승요인이 되는 문제점이 있었다.The flange to be described in the present invention is a detachable type, and the conventional detachable flange is made of metal made of iron or stainless steel. In case of iron, the corrosion is caused by corrosion in air or moisture, which shortens the service life, or the fastening part is loosened due to corrosion. There was a problem that, in the case of stainless steel can solve the problem of iron, but the unit price is so expensive that there was a problem that the rise of construction costs.

본 발명은 분리형의 플랜지를 저렴한 철제로 제작하되 그 철제를 상,하부금형내에 삽입한 뒤 철제의 전체 외면을 합성수지제의 피막층으로 사출성형하여 플랜지의 저렴한 가격과 철제의 부식을 방지하고자 관이음용 플랜지 및 사출성형장치와 그 제조방법을 제공하는 데 그 목적이 있다.The present invention is to manufacture a separate flange of low-cost steel, but inserting the iron into the upper and lower molds, and then injection molding the entire outer surface of the steel to the coating layer made of synthetic resin to prevent the low price of the flange and corrosion of the steel pipe joints The object is to provide a flange and an injection molding apparatus and a method of manufacturing the same.

도 1은 철제플랜지의 사시도1 is a perspective view of an iron flange

도 2(A)(B)(C)(D)는 본 발명 플랜지의 사출성형과정도Figure 2 (A) (B) (C) (D) is an injection molding process of the present invention flange

도 3은 미완성으로 사출성형된 플랜지의 단면도3 is a cross-sectional view of an incompletely injection molded flange

도 4는 완성된 플랜지의 단면도4 is a cross-sectional view of the completed flange

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

1:철제플랜지 2:관구멍 3:체결보울트구멍1: Iron flange 2: Tube hole 3: Tightening bolt hole

4:센터핀구멍 10:하부금형 11;보울트핀4: center pin hole 10: lower mold 11; bolt pin

12:센터핀 13:하부단부 14:하부피복공간12: Center pin 13: Lower end 14: Lower cover space

20:상부금형 21:상부피복공간 22:중앙핀20: upper mold 21: upper covering space 22: the center pin

23:용액차단단부 30:피복층23: solution blocking part 30: coating layer

이하 본 발명을 첨부도면에 의하여 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도1은 본 발명 철제플랜지의 사시도를 나타낸 것으로, 중앙에 관이 끼워지도록 관구멍(2)이 뚫려지는 도우넛의 형상을 가지며, 관구멍(2)의 주변에 체결위치마다 뚫려지는 체결보울트구멍(3)들을 가지는 철제플랜지(1)는 종래와 동일하다.1 is a perspective view of the iron flange of the present invention, having a shape of a donut in which a tube hole 2 is drilled so that a tube is inserted in the center thereof, and a fastening bolt hole drilled at each fastening position around the tube hole 2 ( The iron flange 1 having 3) is the same as the conventional one.

다만 본발명의 플랜지는 상기 철제플랜지(1)의 관구멍(2), 체결보울트구멍 (3) 및 전체 주변을 소정의 피복두께로 균일하게 피복시키도록 합성수지제의 피복층(30)으로 사출성형한 것이 본발명의 특징이다.However, the flange of the present invention is injection molded with a coating layer 30 made of synthetic resin so as to uniformly cover the tube hole 2, the fastening bolt hole 3 and the entire periphery of the steel flange 1 with a predetermined coating thickness. It is a feature of the present invention.

이때 상기 철제플랜지(1)에 최소한 2개이상의 센터핀구멍(4)을 형성한 뒤 합성수지제(30a)로 되메워지도록 한다.At this time, at least two or more center pin holes 4 are formed in the iron flange 1 so as to be filled with the synthetic resin 30a.

도2는 본발명의 사출금형장치를 나타낸 것으로, 중앙에 관이 끼워지도록 관구멍(2)이 뚫려지는 도우넛의 형상을 가지며, 관구멍(2)의 주변에 체결위치마다 뚫려지는 체결보울트구멍(3)들과 소정의 위치마다 뚫려지는 최소한 2개이상의 센터핀구멍(4)을 가지는 철제플랜지(1)와;Figure 2 shows an injection mold apparatus of the present invention, having a shape of a donut in which a tube hole 2 is drilled so that a tube is inserted in the center thereof, and a fastening bolt hole drilled at each fastening position around the tube hole 2 ( 3) and an iron flange 1 having at least two center pin holes 4 drilled at predetermined positions;

상기 센터핀구멍(4)에 여유공간이 없이 끼워져 고정되는 센터핀(12)들과, 상기 관구멍(2) 및 체결보울트구멍(3)에 각각 끼워지되 피복두께만큼의 피복공간을 가지는 중앙핀(22) 및 보울트핀(11)으로 구성되는 상부 및 하부금형(20)(10)과;Center pins 12 inserted into the center pin hole 4 without a clearance and fixed, and center pins fitted into the tube hole 2 and the fastening bolt hole 3, respectively, and having a covering space equal to the coating thickness. Upper and lower molds 20 and 10 composed of a 22 and a bolt pin 11;

상기 센터핀구멍(4)을 제외하고 상기 철제플랜지(1)의 주변을 소정의 피복두께로 균일하게 피복시키도록 상부 및 하부금형(20)(10)의 내부에 합성수지용액을 주입하는 것이 본 발명의 특징이다.The synthetic resin solution is injected into the upper and lower molds 20 and 10 so as to uniformly cover the periphery of the steel flange 1 except for the center pin hole 4 with a predetermined coating thickness. It is a feature of.

상기 하부금형(10)은 체결보울트구멍(3)과 센터핀구멍(4)의 위치에 각각 상방향으로 돌출되게 보울트핀(11)과 센터핀(12)을 형성하되 보울트핀(11)은 체결보울트구멍(3)보다 그 직경을 작게 하여 여유공간을 가지도록 하고 센터핀(12)은 센터핀구멍(4)과 동일한 규격으로 형성하여 여유공간이 없도록 하며; 상기 상부금형 (20)은 하부금형(10)과 형합시 철제플랜지(1)자체가 내장되게 철제플랜지(1)의 규격보다 크게 원형의 상부피복공간(21)을 형성하며, 관구멍(2)의 위치에 그 관구멍 (2)보다 작은 직경의 중앙핀(22)을 상부피복공간(21)의 중앙에 하방향으로 돌출형성한다.The lower mold 10 forms the bolt pin 11 and the center pin 12 to protrude upwards at the positions of the fastening bolt hole 3 and the center pin hole 4, respectively, but the bolt pin 11 is fastened. The diameter is smaller than the bolt hole 3 to have a free space, and the center pin 12 is formed in the same standard as the center pin hole 4 so that there is no free space; The upper mold 20 forms a circular upper coated space 21 larger than the size of the steel flange 1 so that the steel flange 1 itself is embedded when the lower mold 10 and the lower mold 10, the tube hole (2) A central pin 22 having a diameter smaller than that of the tube hole 2 is projected downward in the center of the upper coating space 21 at the position of.

상기 보울트핀(11)들, 센터핀(12)들 및 중앙핀(22)은 하부금형(10) 또는 상부금형(20)중 어느 한 금형에 형성할 수도 있다.The bolt pins 11, the center pins 12, and the center pin 22 may be formed in any one of the lower mold 10 or the upper mold 20.

이때 상기 센터핀(12)의 하단에 센터핀(12)보다 직경이 크게 하부단부(13)를 형성한 뒤 철제플랜지(1)가 얹혀져 피복두께만큼 하부피복공간(14)이 형성되도록 한다.At this time, the lower end portion 13 having a diameter larger than that of the center pin 12 is formed at the lower end of the center pin 12, and the iron flange 1 is placed so that the lower coating space 14 is formed as much as the coating thickness.

또한 사출성형시 합성수지용액이 센터핀구멍(4)으로 유입되지 않도록 상부금형(20)의 상부피복공간(21)에 용액차단단부(23)를 돌출형성할 수도 있으며, 그 용액차단단부(23)는 하부금형(10)의 하부단부(13)와 대향되는 위치에 형성한다. 또한 하부금형(10)의 각 보울트핀(11)의 위치에 너트받침성형홈(15)을 형성하여 피복층의 성형시 그 두께만큼 플랜지의 외면으로 돌출되도록 할 수도 있다.In addition, the solution blocking portion 23 may be protruded into the upper coating space 21 of the upper mold 20 so that the synthetic resin solution does not flow into the center pin hole 4 during injection molding, and the solution blocking portion 23 Is formed at a position opposite to the lower end 13 of the lower mold (10). In addition, the nut support molding groove 15 may be formed at the position of each bolt pin 11 of the lower mold 10 to protrude to the outer surface of the flange by the thickness thereof when forming the coating layer.

도2(A)(B)(C)(D)는 본발명의 사출성형과정을 나타낸 것으로, 하부금형(10)의 보울트핀(11)과 센터핀(12)에 철제플랜지(1)의 체결보울트구멍(3)과 센터핀구멍 (4)을 각각 끼워서 센터핀(12)과 센터핀구멍(4)에 의하여 자동적으로 사출성형될 철제플랜지(1)의 위치를 설정하는 동시에 철제플랜지(1)가 하부단부(13)에 얹혀져 그 하부단부(13)의 두께만큼 피복공간(16)이 형성되도록 하는 철제플랜지조립공정과, 상부금형(20)을 하강시켜 중앙핀(22)이 관구멍(2)에 끼워지도록 하는 동시에 상부금형(20)의 상부피복공간(21)내에 철제플랜지(1)가 내장되도록 하는 철제플랜지내장공정과, 상,하부금형(20)(10)의 상부피복공간(21)과 하부피복공간(14)내로 합성수지용액을 주입하여 센터핀구멍(4)을 제외한 철제플랜지(1)의 전면에 걸쳐서 설정된 두께의 피복층(30)이 사출성형되게 하는 철제플랜지사출성형공정과, 사출성형된 미완성 플랜지를 상,하부금형(20)(10)으로부터 분리시킨 뒤 센터핀구멍(4)에 2차로 합성수지용액을 주입시켜 밀봉되도록 하는 밀봉공정;과정으로 관이음용 플랜지 사출성형방법을 제공하는 것이 본 발명의 특징이다.Figure 2 (A) (B) (C) (D) shows the injection molding process of the present invention, the fastening of the steel flange (1) to the bolt pin 11 and the center pin 12 of the lower mold 10 Insert the bolt hole 3 and the center pin hole 4 respectively to set the position of the steel flange 1 to be automatically injection-molded by the center pin 12 and the center pin hole 4, and at the same time the iron flange 1 Is assembled to the lower end portion 13 so that the cover space 16 is formed by the thickness of the lower end portion 13, and the upper flange 20 is lowered so that the center pin 22 has the tube hole 2 And a steel flange embedding process to allow the steel flange 1 to be embedded in the upper coating space 21 of the upper mold 20 and the upper coating space 21 of the upper and lower molds 20 and 10. And the synthetic resin solution is injected into the lower coating space 14 so that the coating layer 30 having a predetermined thickness over the entire surface of the steel flange 1 except for the center pin hole 4 is injection molded. The iron flange injection molding process and the sealing process for separating the injection-molded flange from the upper and lower molds (20, 10) and injecting the synthetic resin solution into the center pin hole (4) to seal the secondary; It is a feature of the present invention to provide a flange injection molding method for pipe fittings.

이하 본 발명의 실시예를 첨부도면에 의하여 상세히 설명하면 다음과 같다.Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

철제플랜지조립공정은 도2(B)와 같이 하부금형(10)의 보울트핀(11)과 센터핀 (12)에 철제플랜지(1)의 체결보울트구멍(3)과 센터핀구멍(4)을 각각 끼우게 되면 센터핀(12)과 센터핀구멍(4)에 의하여 자동적으로 사출성형될 철제플랜지(1)의 위치가 설정되는 공정이다. 즉, 센터핀(12)과 센터핀구멍(4)은 정밀가공되어 있어 상호 조립 및 분리가 용이하도록 되어 있기 때문에 작업자 또는 자동시스템으로 하부금형(10)에 철제플랜지(1)를 상술한 바와같이 끼우게 되면 유동되지 않으면서 하부금형의 보울트핀(11)에 철제플랜지(1)의 체결보울트구멍(3)이 끼워져 설정된 간격을 유지하게 된다. 왜냐하면 체결보울트구멍(3)이 보울트핀(11)보다 그 직경이 크게 형성되어 있어 사출성형시 후술하는 피복층을 형성할 수가 있기 때문이다.In the steel flange assembly process, as shown in FIG. 2 (B), the bolt pin 11 and the center pin hole 4 of the steel flange 1 are connected to the bolt pin 11 and the center pin 12 of the lower mold 10. When fitted, respectively, the position of the iron flange 1 to be automatically injection-molded by the center pin 12 and the center pin hole 4 is set. That is, since the center pin 12 and the center pin hole 4 are precisely processed to facilitate mutual assembly and separation, the iron flange 1 is mounted on the lower mold 10 by an operator or an automatic system as described above. When fitted, the fastening bolt hole 3 of the iron flange 1 is inserted into the bowl pin 11 of the lower mold to maintain the set interval. This is because the fastening bolt hole 3 has a larger diameter than the bolt pin 11 so that a coating layer to be described later can be formed during injection molding.

또한 하부금형(10)에 상술한 바와같이 철제플랜지(1)가 끼워지게 되면 철제플랜지(1)의 바닥면이 하부단부(13)에 얹혀져 그 하부단부(13)의 두께만큼 피복공간(16)이 형성된다. 이때 양측 센터핀(12)을 제외한 다수의 보울트핀(11)측에 각각 끼워진 철제플랜지(1)의 바닥면은 허공에 떠있어 그 피복공간(16)으로 합성수지용액이 주입될 때 철제플랜지(1)의 바닥면전체를 피복시킬 수가 있는 것이다.In addition, when the iron flange 1 is inserted into the lower mold 10 as described above, the bottom surface of the iron flange 1 is placed on the lower end 13 so that the covering space 16 is as thick as the lower end 13. Is formed. At this time, the bottom surface of the iron flange (1) fitted to each of the plurality of bolt pins 11, except for the center pins 12 on both sides is floating in the air and when the synthetic resin solution is injected into the coating space (16) It is possible to cover the entire bottom surface.

그리고 철제플랜지내장공정은 도2(C)와 같이 철제플랜지조립공정후 상부금형 (20)을 하강시키게 되면 중앙핀(22)이 관구멍(2)에 끼워지는 동시에 상부금형(20)의 상부피복공간(21)내에 철제플랜지(1)가 내장된다. 상기 상부피복공간(21)은 철제플랜지(1)의 규격보다 크게 형성되어 있어 철제플랜지(1)의 내장 후 철제플랜지 (1)의 내,외부 및 상부에 설정된 간격만큼 공간이 형성되어 사출성형시 철제플랜지 (1)의 전체면에 걸쳐서 피복층이 형성되게 하는 공정이다.In the steel flange mounting process, as shown in FIG. 2 (C), when the upper mold 20 is lowered after the steel flange assembly process, the central pin 22 is inserted into the tube hole 2 and the upper coating of the upper mold 20 is carried out. The steel flange 1 is built in the space 21. The upper coating space 21 is formed larger than the specification of the steel flange (1) and after the built-in steel flange (1) space is formed by the interval set in the inner, outer and top of the steel flange (1) when injection molding It is a process of forming a coating layer over the whole surface of the steel flange 1.

철제플랜지사출성형공정은 도2(D)와 같이 상,하부금형(20)(10)의 형합 후 상부피복공간(21)과 하부피복공간(14)내로 합성수지용액을 주입하면 센터핀구멍(4)을 제외한 철제플랜지(1)의 전면에 걸쳐서 설정된 두께의 피복층(30)이 사출성형되는공정이다. 상기 센터핀구멍(4)으로 합성수지용액이 주입되지 않는 이유는 센터핀구멍(4)이 센터핀(12)과 어느정도 정밀하게 끼워져 있어 합성수지용액이 주입될 수가 없기 때문이다.The steel flange injection molding process is performed by injecting a synthetic resin solution into the upper coating space 21 and the lower coating space 14 after molding the upper and lower molds 20 and 10 as shown in FIG. 2 (D). The coating layer 30 having the thickness set over the entire surface of the iron flange 1 except for the step (b) is injection molding. The reason why the synthetic resin solution is not injected into the center pin hole 4 is that the synthetic resin solution cannot be injected because the center pin hole 4 is inserted into the center pin 12 to some extent.

밀봉공정은 철제플랜지사출성형공정에서 도3과 같이 사출성형된 미완성 플랜지를 상,하부금형(20)(10)으로부터 분리시킨 뒤 도4와 같이 센터핀구멍(4)에 2차로 합성수지용액을 주입시켜 밀봉되도록 하는 공정이다. 즉, 상술한 공정에서 센터핀구멍(4)으로는 합성수지용액이 충전되지 않아 철제가 노출되어 있어 부식될 염려가 있는 상태이므로 별도의 작업으로 센터핀구멍(4)에 합성수지제(30a)를 주입하여 경화시켜 주므로서 피복층(30)과 일체화되게 하는 것이다.The sealing process separates the injection-molded flange from the upper and lower molds 20 and 10 as shown in FIG. 3 in the steel flange injection molding process, and then injects the synthetic resin solution into the center pin hole 4 as shown in FIG. To be sealed. That is, in the above-described process, since the synthetic resin solution is not filled into the center pin hole 4 and the steel is exposed, the state may be corroded. Therefore, the synthetic resin 30a is injected into the center pin hole 4 by a separate operation. It hardens | cures by making it integrate, and it is made to integrate with the coating layer 30.

이와같이 본 발명은 분리형의 플랜지를 저렴한 철제로 제작하되 그 철제를 상,하부금형내에 삽입한 뒤 철제의 전체 외면을 합성수지제의 피막층으로 사출성형하여 주므로서 플랜지의 저렴한 가격으로 시공비의 절감과 철제의 부식을 방지할 수가 있는 효과가 있다.As described above, the present invention manufactures a separate flange of inexpensive steel, but inserts the iron into the upper and lower molds, and then injection molding the entire outer surface of the steel into a coating layer made of synthetic resin, thereby reducing construction cost and reducing the cost of the flange. There is an effect that can prevent corrosion.

Claims (7)

중앙에 관이 끼워지도록 관구멍(2)이 뚫려지는 도우넛의 형상을 가지며, 관구멍(2)의 주변에 체결위치마다 뚫려지는 체결보울트구멍(3)들과 소정의 위치마다 뚫려지는 최소한 2개이상의 센터핀구멍(4)을 가지는 철제플랜지(1)와;It has a shape of a donut in which the tube hole 2 is drilled so that the tube is inserted in the center, the fastening bolt holes 3 which are drilled in the periphery of the tube hole 2 at each of the fastening positions, and at least two holes which are drilled at the predetermined positions. An iron flange 1 having the above center pin hole 4; 상기 센터핀구멍(4)에 여유공간이 없이 끼워져 고정되는 센터핀(12)들과, 상기 관구멍(2) 및 체결보울트구멍(3)에 각각 끼워지되 피복두께만큼의 피복공간을 가지는 중앙핀(22) 및 보울트핀(11)으로 구성되는 상부 및 하부금형(20)(10)과;Center pins 12 inserted into the center pin hole 4 without a clearance and fixed, and center pins fitted into the tube hole 2 and the fastening bolt hole 3, respectively, and having a covering space equal to the coating thickness. Upper and lower molds 20 and 10 composed of a 22 and a bolt pin 11; 상기 센터핀구멍(4)을 제외하고 상기 철제플랜지(1)의 주변을 소정의 피복두께로 균일하게 피복시키도록 상부 및 하부금형(20)(10)의 내부에 합성수지용액을 주입하는 것을 특징으로 하는 관이음용 플랜지 사출성형장치.A synthetic resin solution is injected into the upper and lower molds 20 and 10 to uniformly cover the periphery of the steel flange 1 except for the center pin hole 4 to a predetermined coating thickness. Pipe injection flange injection molding machine. 제1항에 있어서, 상기 보울트핀(11)들, 센터핀(12)들 및 중앙핀(22)은 하부금형(10) 또는 상부금형(20)중 어느 한 금형에 형성한 것을 특징으로 하는 관이음용 플랜지 사출성형장치.According to claim 1, wherein the bolt pins 11, the center pins 12 and the center pins 22, characterized in that formed in any one of the lower mold 10 or the upper mold (20) Joint flange injection molding machine. 제1항에 있어서, 상기 하부금형(10)은 체결보울트구멍(3)과 센터핀구멍(4)의 위치에 각각 상방향으로 돌출되게 보울트핀(11)과 센터핀(12)을 형성하되 보울트핀 (11)은 체결보울트구멍(3)보다 그 직경을 작게 하여 여유공간을 가지도록 하고 센터핀(12)은 센터핀구멍(4)과 동일한 규격으로 형성하여 여유공간이 없도록 하며;According to claim 1, wherein the lower mold 10 is formed with a bolt pin 11 and the center pin 12 to protrude in the upward direction at the position of the fastening bolt hole 3 and the center pin hole (4) The pin 11 has a diameter smaller than that of the fastening bolt hole 3 to have a free space, and the center pin 12 is formed in the same size as the center pin hole 4 so that there is no free space; 상기 상부금형(20)은 하부금형(10)과 형합시 철제플랜지(1)자체가 내장되게 철제플랜지(1)의 규격보다 크게 원형의 상부피복공간(21)을 형성하며, 관구멍(2)의 위치에 그 관구멍(2)보다 작은 직경의 중앙핀(22)을 상부피복공간(21)의 중앙에 하방향으로 돌출형성한 것을 특징으로 하는 관이음용 플랜지 사출성형장치.The upper mold 20 forms a circular upper coated space 21 larger than the size of the steel flange 1 so that the steel flange 1 itself is embedded when the lower mold 10 and the lower mold 10 is combined, and the tube hole 2 Flange injection molding apparatus for a pipe fitting, characterized in that the central pin (22) having a diameter smaller than that of the tube hole (2) at the position of the protruding downward in the center of the upper coating space (21). 제1항, 제2항 및 제3항에 있어서, 상기 센터핀(12)의 하단에 센터핀(12)보다 직경이 크게 하부단부(13)를 형성한 뒤 철제플랜지(1)가 얹혀져 피복두께만큼 하부피복공간(14)이 형성되도록 한 것을 특징으로 하는 관이음용 플랜지 사출성형장치.According to claim 1, 2 and 3, wherein the lower end of the center pin 12 has a diameter larger than the center pin 12 to form a lower end 13, the iron flange 1 is placed on the coating thickness Flange injection molding apparatus for a pipe joint, characterized in that the lower coating space 14 is formed as much. 하부금형(10)의 보울트핀(11)과 센터핀(12)에 철제플랜지(1)의 체결보울트구멍(3)과 센터핀구멍(4)을 각각 끼워서 센터핀(12)과 센터핀구멍(4)에 의하여 자동적으로 사출성형될 철제플랜지(1)의 위치를 설정하는 동시에 철제플랜지(1)가 하부단부(13)에 얹혀져 그 하부단부(13)의 두께만큼 피복공간(16)이 형성되도록 하는 철제플랜지조립공정과,Insert the bolt hole 3 and the center pin hole 4 of the steel flange 1 into the bolt pin 11 and the center pin 12 of the lower mold 10, respectively, so that the center pin 12 and the center pin hole ( By setting the position of the steel flange 1 to be automatically injection molded by 4) and at the same time the steel flange 1 is placed on the lower end 13 so that the covering space 16 is formed by the thickness of the lower end 13 Steel flange assembly process, 상부금형(20)을 하강시켜 중앙핀(22)이 관구멍(2)에 끼워지도록 하는 동시에 상부금형(20)의 상부피복공간(21)내에 철제플랜지(1)가 내장되도록 하는 철제플랜지내장공정과,Lowering the upper mold 20 so that the center pin 22 is fitted into the tube hole 2 and the iron flange 1 is embedded in the upper flange 21 of the upper mold 20 so that the steel flange 1 is embedded therein. and, 상,하부금형(20)(10)의 상부피복공간(21)과 하부피복공간(14)내로 합성수지용액을 주입하여 센터핀구멍(4)을 제외한 철제플랜지(1)의 전면에 걸쳐서 설정된 두께의 피복층(30)이 사출성형되게 하는 철제플랜지사출성형공정과,The synthetic resin solution is injected into the upper coating space 21 and the lower coating space 14 of the upper and lower molds 20 and 10, and the thickness is set over the entire surface of the steel flange 1 except for the center pin hole 4. An iron flange injection molding process for causing the coating layer 30 to be injection molded; 사출성형된 미완성 플랜지를 상,하부금형(20)(10)으로부터 분리시킨 뒤 센터핀구멍(4)에 2차로 합성수지용액을 주입시켜 밀봉되도록 하는 밀봉공정;A sealing process of separating the injection molded unfinished flange from the upper and lower molds 20 and 10 and injecting the synthetic resin solution into the center pin hole 4 to seal the secondary mold; 으로 제조함을 특징으로 하는 관이음용 플랜지 사출성형방법.Flange injection molding method for pipe fittings characterized in that the manufacturing. 중앙에 관이 끼워지도록 관구멍(2)이 뚫려지는 도우넛의 형상을 가지며, 관구멍(2)의 주변에 체결위치마다 뚫려지는 체결보울트구멍(3)들을 가지는 철제플랜지(1)와;An iron flange (1) having a shape of a donut in which a tube hole (2) is drilled so that a tube is fitted in the center thereof, and having fastening bolt holes (3) drilled at each fastening position around the tube hole (2); 상기 철제플랜지(1)의 관구멍(2), 체결보울트구멍(3) 및 전체 주변을 소정의 피복두께로 균일하게 피복시키도록 합성수지제의 피복층(30)으로 사출성형한 것을 특징으로 하는 관이음용 플랜지.A tube characterized in that the injection molding with a coating layer 30 made of synthetic resin so as to uniformly cover the tube hole 2, the fastening bolt hole 3 and the entire periphery of the steel flange (1) to a predetermined coating thickness. Drinking Flange. 제6항에 있어서, 상기 철제플랜지(1)에 최소한 2개이상의 센터핀구멍(4)을 형성한 뒤 합성수지제로 되메워지도록 한 것을 특징으로 하는 관이음용 플랜지.The pipe fitting flange according to claim 6, wherein at least two center pin holes (4) are formed in the iron flange (1) and then filled with synthetic resin.
KR1020020066229A 2002-10-29 2002-10-29 Flange for pipe and method and apparatus for producing thereof KR100562532B1 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101352913A (en) * 2008-08-27 2009-01-28 无锡市海溪防腐设备厂 Storage tank flange molding mold of one-shot forming bolt hole
CN103302803A (en) * 2013-06-12 2013-09-18 北京化工大学 Forming mold and forming method of micro composite plastic part
KR20180064055A (en) * 2016-12-05 2018-06-14 최준호 Plastic Molding Flange
KR102323356B1 (en) * 2020-11-06 2021-11-09 주식회사 티앤지 Joint structure between cooling panel and flange through insert injection
CN114407285A (en) * 2021-12-27 2022-04-29 江苏磊霆精密新材料有限公司 Flange plate forming die, injection molding method thereof and flange plate

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6114920A (en) * 1984-06-30 1986-01-23 Kyushu Sekisui Kogyo Kk Molding method of fiber reinforced plastic flanged socket by resin injection method
JPH049518Y2 (en) * 1985-05-31 1992-03-10
JP3131707B2 (en) * 1992-03-26 2001-02-05 エヌオーケー株式会社 Method for manufacturing resin molded article having insert fitting
JPH07144339A (en) * 1993-11-25 1995-06-06 Nippon Mektron Ltd Production of solid roller

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101352913A (en) * 2008-08-27 2009-01-28 无锡市海溪防腐设备厂 Storage tank flange molding mold of one-shot forming bolt hole
CN103302803A (en) * 2013-06-12 2013-09-18 北京化工大学 Forming mold and forming method of micro composite plastic part
CN103302803B (en) * 2013-06-12 2015-07-08 北京化工大学 Forming mold and forming method of micro composite plastic part
KR20180064055A (en) * 2016-12-05 2018-06-14 최준호 Plastic Molding Flange
KR102323356B1 (en) * 2020-11-06 2021-11-09 주식회사 티앤지 Joint structure between cooling panel and flange through insert injection
CN114407285A (en) * 2021-12-27 2022-04-29 江苏磊霆精密新材料有限公司 Flange plate forming die, injection molding method thereof and flange plate

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